JP2633372B2 - Rolling method of thick steel plate - Google Patents
Rolling method of thick steel plateInfo
- Publication number
- JP2633372B2 JP2633372B2 JP8093290A JP8093290A JP2633372B2 JP 2633372 B2 JP2633372 B2 JP 2633372B2 JP 8093290 A JP8093290 A JP 8093290A JP 8093290 A JP8093290 A JP 8093290A JP 2633372 B2 JP2633372 B2 JP 2633372B2
- Authority
- JP
- Japan
- Prior art keywords
- rolling
- width
- slab
- thick steel
- length
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Description
【発明の詳細な説明】 ＜産業上の利用分野＞ 本発明は、一つのスラブから複数の異幅・異厚の厚鋼
板を製造する厚板圧延方法に関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a thick plate rolling method for manufacturing a plurality of steel plates having different widths and thicknesses from one slab.
＜従来の技術＞ 一般に厚鋼板は用途の多様性により、小ロット・多品
種の注文生産が前提であるため、圧延機の能力や歩留り
などを考慮して通常同一スラブ内に幅，厚さの異なる数
種の厚鋼板を組み込んで圧延に供している。<Conventional technology> In general, steel plates are premised on order production of small lots and multi-products due to the variety of uses. Therefore, in consideration of the rolling mill capacity and yield, the width and thickness of steel plates are usually within the same slab. Several different types of steel plates are incorporated for rolling.
第３図は、このような幅，厚さの異なる厚鋼板を取合
わせて極力大きな一つのスラブとなして、熱間圧延する
方法の一例を示したものである。すなわち、幅，厚さの
異なる厚鋼板p1およびp2を取合わせて製造する場合に必
要なスラブA1およびA2を一つの大きなスラブ（以下、長
尺スラブという）Ａとなし、この長尺スラブＡを加熱
後、その長手方向の中間部を幅方向に例えばガス切断し
て短尺スラブA1,A2に分割したのち、それぞれの短尺ス
ラブA1,A2を順次熱間圧延して所定の寸法の圧延材a1お
よびa2となし、これら圧延材a1,a2をそれぞれ次工程の
切断工程で所定の寸法に切断して厚鋼板p1およびp2を製
造する方法である。FIG. 3 shows an example of a method in which such thick steel plates having different widths and thicknesses are combined to form one large slab and hot-rolled. That is, the width, the thickness of different steel plate p 1 and one large slab slab A 1 and A 2 necessary when a p 2 was Toawa prepared (hereinafter, referred to as long slabs) A ungated, this length After heating the shank slab A, the middle part in the longitudinal direction is gas-cut in the width direction, for example, and divided into short slabs A 1 and A 2 , and then the short slabs A 1 and A 2 are sequentially hot-rolled. is given of the strip a 1 and a 2 ungated dimensions, these rolled material a 1, a 2, respectively methods for producing the next step of the cutting process the steel plate p 1 and p 2 is cut into a predetermined size in .
あるいはまた、第４図に示すように、加熱後の長尺ス
ラブＡを熱間圧延するに際し、圧延途中でロール開度を
スラブ中間部より変更して異幅・異厚の圧延材a3を形成
し、この圧延材a3よりそれぞれ寸法の異なる厚鋼板p1お
よびp2を製造する方法がある。Alternatively, as shown in FIG. 4, when the long slab A after the heating is hot-rolled, the roll opening degree is changed from the middle of the slab to a rolled material a 3 having a different width and a different thickness during the rolling. formed, there is a method of manufacturing the rolled material a 3 different steel plates each having dimensions than p 1 and p 2.
＜発明が解決しようとする課題＞ しかしながら、上記した前者の方法では加熱後の長尺
スラブをガス切断した後それぞれの分割後のスラブを幅
出し圧延と長さ方向圧延を行う必要があり、圧延能率が
低下して好ましくない。さらにガス切断に長時間を要す
るために、分割後のスラブは先行スラブの圧延中に後続
スラブを圧延機後法方で待機させねばならず、この間後
続スラブは大気中で放冷されることになり、スラブ温度
が低下するなどの問題点がある。<Problems to be Solved by the Invention> However, in the former method described above, it is necessary to perform tentative rolling and lengthwise rolling on each divided slab after gas cutting the long slab after heating, Efficiency is undesirably reduced. In addition, since it takes a long time to cut the gas, the divided slab must wait for the succeeding slab in the rolling method of the preceding slab during rolling of the preceding slab, during which the subsequent slab is allowed to cool in the atmosphere. Problems such as a decrease in slab temperature.
一方、後者の方法は、圧延途中でロール開度を変更し
て異端・異厚の圧延材とするために、寸法変更部（第４
図のＬ）に相当する長さのオフゲージ部が生じて歩留り
が悪化する。また圧延途中の変更可能なロール開度もた
かだか３〜4mm位であり、したがって取合わせができる
厚鋼板の寸法差にも制約が生じるなど歩留り低下の要因
にもなる欠点がある。On the other hand, in the latter method, in order to change the roll opening degree during the rolling to obtain a rolled material having a different end and a different thickness, a dimension changing unit (fourth
An off-gauge portion having a length corresponding to L) in the drawing is generated, and the yield is deteriorated. Further, the roll opening that can be changed during rolling is at most about 3 to 4 mm, and thus there is a drawback that the yield difference is reduced, for example, there is a restriction on the dimensional difference of the thick steel plates that can be assembled.
このような従来の問題を改善する手段の一つとして、
例えば特開昭60−68102号公報に開示されているような
圧延方法がある。すなわち、第５図に示すように、加熱
炉１と圧延機４の間に保温カバー２と切断機３を設け
て、寸法の異なる複数の厚鋼板を一つのスラブに取合わ
せて大きな長尺スラブＡとし、この長尺スラブＡを加熱
後、一旦中間厚まで粗圧延して中間材Ａ′（図示せず）
となし、次いでこの中間材Ａ′を切断機３により所定の
複数枚の分割中間材A1′,A2′に分割し、トップの分割
中間材A2′より圧延を行って厚鋼板a2とし、トップ分割
中間材A2′の圧延中に他の分割中間材A1′は保温カバー
２内で保温しながら、先行の分割中間材A2′の圧延完了
後順次各所定寸法の厚鋼板a1に仕上圧延する方法であ
る。One of the means to improve such conventional problems is
For example, there is a rolling method as disclosed in JP-A-60-68102. That is, as shown in FIG. 5, a heat insulating cover 2 and a cutting machine 3 are provided between a heating furnace 1 and a rolling mill 4, and a plurality of thick steel plates having different dimensions are combined into one slab to form a large long slab. A, and after heating this long slab A, it is rough-rolled once to an intermediate thickness and an intermediate material A '(not shown)
Ungated, then this 'by cutting machine 3 to a predetermined plurality divided intermediate material A 1' intermediate material A, A 2 'is divided into the top of the split intermediate material A 2' from performing rolling steel plate a 2 During the rolling of the top divided intermediate material A 2 ′, the other divided intermediate materials A 1 ′ are kept in the heat insulating cover 2 while the thick steel plates having the predetermined dimensions are sequentially arranged after the completion of the rolling of the preceding divided intermediate material A 2 ′. a method of finish rolling to a 1.
この方法によれば、確かに上記のような従来の問題点
は解決されているが、しかし次のような問題がある。According to this method, the above-mentioned conventional problems are certainly solved, but there are the following problems.
長尺スラブを中間材に圧延するに際し、中間材の寸
法の決定について、板厚は薄いほどよいがしかしあまり
薄くすると熱放散面積が増加して材料温度が低下し易く
なるなどの条件を考慮する必要があり、また取合わせた
厚鋼板の最大板厚よりも薄くしないこと、さらに切断
機，保温カバー，テーブルローラなどの設備能力などの
種々の条件を合わせて考慮して決定する必要があり、そ
の制約が大きいこと。When rolling a long slab into an intermediate material, when determining the dimensions of the intermediate material, consider the conditions that the thinner the plate, the better, but if it is too thin, the heat dissipation area increases and the material temperature tends to decrease. It is necessary to take into account various conditions such as not being thinner than the maximum thickness of the combined thick steel plate, and furthermore, considering various conditions such as the capacity of the cutting machine, heat insulation cover, table roller, etc. The restrictions are large.
分割後の圧延において分割が適当でないと、幅出し
圧延と延伸圧延を必ず必要とするため圧延能率が悪く、
また歩留りも低下するおそれがあること。If the division is not appropriate in the rolling after the division, the rolling efficiency is inferior because tentative rolling and elongation rolling are always required,
Also, the yield may be reduced.
このように従来技術においては、圧延能率の向上を目
的としてスラブ単重の拡大を指向しようとすれば、幅，
厚さの差異に起因した歩留りの低下が避けられないので
ある。As described above, in the prior art, if an attempt is made to increase the unit weight of the slab in order to improve the rolling efficiency, the width,
A decrease in yield due to the difference in thickness is inevitable.
本発明は、上記のような課題を解決すべくしてなされ
た厚鋼板の圧延方法を提供することを目的とする。An object of the present invention is to provide a method for rolling a thick steel plate which has been made to solve the above problems.
＜課題を解決するための手段＞ 本発明は、少なくとも幅寸法の異なる複数の厚鋼板を
一つのスラブに取合わせて大きな寸法となした長尺スラ
ブを加熱後、一旦中間材に圧延し、分割したのち所定の
寸法の厚鋼板にそれぞれ圧延する厚鋼板の圧延方法にお
いて、前記中間材を、その幅が先行して圧延される厚鋼
板の幅寸法に対応して必要とされるスラブの幅寸法と同
一な寸法に、またその長さが前記先行して圧延される厚
鋼板の長さ寸法に対応して必要とされるスラブの長さ寸
法と同一の長さと、後続して圧延される厚鋼板の幅寸法
に対応して必要とされるスラブの幅寸法と同一の長さと
を組み合わせた長さに、それぞれなるように圧延する工
程と、この中間材を前記複数の厚鋼板のそれぞれの寸法
に対応する長さに分割する工程と、前記先行して圧延さ
れる厚鋼板は中間材の長さ方向に、前記後続して圧延さ
れる厚鋼板は90゜転回して中間材の幅方向に所定の寸法
になるように順次圧延する工程と、からなることを特徴
とする厚鋼板の圧延方法である。<Means for Solving the Problems> The present invention combines a plurality of thick steel plates having at least different width dimensions into one slab, heats a long slab having a large size, temporarily rolls it into an intermediate material, and divides it. Then, in the method of rolling a thick steel plate to be rolled into a thick steel plate having a predetermined size, the width of the slab is required to correspond to the width of the thick steel plate whose width is rolled in advance. And the same length as the required length of the slab corresponding to the length of the previously rolled steel plate, and the thickness to be subsequently rolled. A step of rolling to a length obtained by combining the width and the same length of the slab required for the width of the steel sheet with each other, and the size of the intermediate material to each of the plurality of thick steel plates Dividing into lengths corresponding to Rolling the thick steel plate to be rolled in the longitudinal direction of the intermediate material, and rolling the steel plate to be subsequently rolled by 90 ° so as to have a predetermined size in the width direction of the intermediate material, This is a method for rolling a thick steel plate.
＜作 用＞ 本発明によれば、複数の厚鋼板のそれぞれに必要とさ
れるスラブ寸法のみから中間材寸法を決め、かつ分割後
の後行で圧延する分割中間材の寸法を熱損失の少ない寸
法に設計し、さらに分割後の圧延における転回数を最小
にするようにしたので、幅出し圧延をなくすことが可能
である。<Operation> According to the present invention, the intermediate material dimensions are determined only from the slab dimensions required for each of the plurality of thick steel plates, and the dimensions of the divided intermediate materials to be rolled in the succeeding line after the division are reduced in heat loss. Since the dimensions are designed and the number of times of rolling in the rolling after division is minimized, it is possible to eliminate the tentering rolling.
以下に、本発明法による中間材の長さの決定およびそ
の分割長さの決定の手順について、第１図を参照して具
体的に説明する。Hereinafter, the procedure for determining the length of the intermediate material and determining the division length according to the method of the present invention will be specifically described with reference to FIG.
いま、厚さ;t1×幅;w1×長さ;l1および厚さ;t2×
幅;w2×長さ;l2なる２枚の厚鋼板a1,a2を、寸法が厚さ;
T×幅;W×長さ;Lなる１枚の長尺スラブＡから圧延する
ものとすると、上記の各寸法の関係はマスフロー一定則
により下記（１）式を満足する必要がある。Now, thickness; t 1 × width; w 1 × length; l 1 and thickness; t 2 ×
Width; w 2 × length; l 2 two thick steel plates a 1 , a 2 , the dimensions are thickness;
Assuming that one long slab A of T × width; W × length; L is to be rolled, the relationship between the above dimensions must satisfy the following equation (1) according to the constant law of mass flow.
ここで、Y1,Y2は厚鋼板a1,a2の設定歩留り値であり、
またw1≧Ｗまたはw2≧Ｗであることが必要であり、以下
においてw1≧Ｗの場合について説明をするものとする。 Here, Y 1 and Y 2 are set yield values of the thick steel plates a 1 and a 2 ,
In addition, it is necessary that w 1 ≧ W or w 2 ≧ W, and the case where w 1 ≧ W will be described below.
ついで、長尺スラブＡに通常の圧延を施して寸法が
厚さ;T′×幅;W′×長さ;L′なる中間材Ａ′とし、これ
を２分割してそれぞれの長さがL1′,L2′になるような
分割中間材A1′,A2′とする場合の各寸法関係は以下の
ように決定する。Next, the long slab A is subjected to ordinary rolling to obtain an intermediate material A ′ having dimensions of thickness; T ′ × width; W ′ × length; L ′. The dimensional relationships in the case where the divided intermediate members A 1 ′ and A 2 ′ are 1 ′ and L 2 ′ are determined as follows.
Ｌ′＝L1′＋L2′ ……（２） Ｗ′＝w1＋α１ ……（３） L2′＝w2＋α２ ……（４） ここで、α1,α２は、分割中間材A1′,A2′での必要
幅代である。L ′ = L 1 ′ + L 2 ′ (2) W ′ = w 1 + α 1 (3) L 2 ′ = w 2 + α 2 (4) where α 1 and α 2 are divided This is the required width allowance for the intermediate materials A 1 ′ and A 2 ′.
したがって、前記（２）〜（５）式からL1′は下記
（６）式で求めることができる。 Therefore, L 1 ′ can be obtained by the following equation (6) from the above equations (2) to (5).
このようにして寸法を決定したら、まず長尺スラブ
Ａを中間材Ａ′に圧延し、その長さＬ′を分割して長さ
L1′,L2′なる分割中間材A1′,A2′を得る。 After the dimensions are determined in this way, first, the long slab A is rolled into an intermediate material A ', and its length L' is divided into lengths.
L 1 ', L 2' becomes divided intermediate material A 1 ', A 2' obtained.
そして、まず先行の分割中間材A1′を長手方向に減
厚圧延のみをして所望の寸法を有する厚鋼板a1を製造す
る。Then, first, the preceding split intermediate material A 1 ′ is subjected to only thickness reduction rolling in the longitudinal direction to produce a thick steel plate a 1 having desired dimensions.
ついで、残りの分割中間材A2′を90゜転回した後幅
方向に減厚圧延のみをして所望の寸法を有する厚鋼板a2
を製造する。Next, after turning the remaining divided intermediate material A 2 ′ by 90 °, only the thickness reduction rolling in the width direction is performed, and a thick steel plate a 2 having desired dimensions is obtained.
To manufacture.
以上の説明では、分割中間材A1′を先行材としたが、
逆に分割中間材A2′を先行材とすることもできる。な
お、この場合は先行する分割中間材A2′を90゜転回とし
て、また後行する分割中間材A1′をそのままの方向で減
厚圧延することになる。In the above description, the split intermediate material A 1 ′ was set as the preceding material,
Conversely, the divided intermediate material A 2 ′ can be used as the preceding material. In this case, the preceding divided intermediate material A 2 ′ is turned by 90 °, and the subsequent divided intermediate material A 1 ′ is subjected to thickness reduction rolling in the same direction.
なお、中間材Ａ′の切断時にラインのロスタイムが生
じるのを防ぐために、例えば第２図に示すように切断機
３および保温カバー２をバイパスライン６に取付けるよ
うにすれば、切断中においても次の長尺スラブを圧延す
ることができ、連続圧延を実施することが可能である。
ここで、中間材Ａ′の切断に用いる切断機３は、例えば
酸素ジェットによりトーチカッタなどの高速切断可能な
型式が望ましい。In addition, in order to prevent a line loss time from occurring when cutting the intermediate material A ', for example, as shown in FIG. 2, if the cutting machine 3 and the heat retaining cover 2 are attached to the bypass line 6, the following process can be performed even during cutting. Long slab can be rolled, and continuous rolling can be performed.
Here, the cutting machine 3 used for cutting the intermediate material A 'is desirably of a type capable of high-speed cutting such as a torch cutter by an oxygen jet.
また、トップの分割中間材A1′の圧延中は後行の分割
中間材A2′を保温カバー２内で保温しておき、先行の分
割材A1′の圧延完了後順次所望の寸法に圧延するように
すれば、温度降下を最小に抑制することができる。During the rolling of the top divided intermediate material A 1 ′, the succeeding divided intermediate material A 2 ′ is kept warm in the heat insulating cover 2, and after the preceding divided material A 1 ′ is rolled, it is sequentially reduced to a desired size. By rolling, the temperature drop can be suppressed to a minimum.
上記の説明は２分割のケースについて述べたものであ
るが、３分割の場合についても同様な考えを基にして行
うことが可能である。Although the above description has been made with respect to the case of two divisions, the case of three divisions can be performed based on the same idea.
すなわち、取合わされる厚鋼板３枚のうち、例えば２
枚の幅が同一で残りの１枚が異なる場合は、まず同一の
幅の２枚の必要長さに３枚目の必要幅に対応した長さを
加算して中間材を圧延した後３分割するようにして、長
手方向に減厚圧延または90゜転回後幅方向に減厚圧延す
るようにする。この場合、分割中間材の取り合わせ順序
はいかようでも構わない。That is, of the three thick steel plates to be assembled, for example, 2
If the width of the sheet is the same and the remaining one is different, first add the length corresponding to the third required width to the required length of the two sheets of the same width, roll the intermediate material, and then divide into three In this way, thickness reduction rolling in the longitudinal direction or thickness reduction rolling in the width direction after turning by 90 ° is performed. In this case, the order of assembling the divided intermediate materials does not matter.
また、取合わされる厚鋼板３枚の幅が全部異なる場合
は、その３枚のうち例えば最も幅寸法の小さい厚鋼板の
幅を中間材の幅とし、その必要長さに残りの２枚の幅に
対応する長さを加算して中間材の長さとなるように圧延
し、３分割後は幅寸法の小さい分割中間材はそのまま長
手方向に減厚圧延し、他の分割中間材は90゜転回した後
幅方向に減厚圧延するようにすればよい。If the widths of the three thick steel plates to be combined are all different, for example, the width of the thickest steel plate having the smallest width is taken as the width of the intermediate material, and the width of the remaining two steel plates is set to the required length. Is added to the length corresponding to the length of the intermediate material and rolled to the length of the intermediate material. After division into three, the intermediate material with a small width is reduced in thickness in the longitudinal direction, and the other intermediate materials are turned 90 °. After that, it is sufficient to reduce the thickness in the width direction.
＜実施例＞ 厚さ;35mm×幅;2500mm×長さ;18500mmおよび厚さ;20m
m×幅;4000mm×長さ;20000mmの寸法の異なる２枚の厚鋼
板a1,a2を同時に製造する際に、本発明法を適用して行
った。<Example>thickness; 35 mm x width; 2500 mm x length; 18500 mm and thickness; 20 m
The method of the present invention was applied to simultaneously manufacture two thick steel plates a 1 and a 2 having different dimensions of m × width; 4000 mm × length; 20000 mm.
長尺スラブＡとしては、従来の経験から設定歩留り値
を95％とした場合、厚さ;310mm×幅;2240mm×長さ;2454
mmと厚さ;310mm×幅;2240mm×長さ;2425mmの寸法のスラ
ブが必要であったことから、厚さ;310mm×幅;2240mm×
長さ;4879mmの寸法のものを用いた。As the long slab A, the thickness: 310 mm × width; 2240 mm × length; 2454
mm and thickness; 310 mm x width; 2240 mm x length; 2425 mm dimensions were required, so thickness: 310 mm x width; 2240 mm x
The length was 4879 mm.
そして、α1,α２をそれぞれ50mm,50mmとして、前記
（１）〜（６）式を用いて計算した結果、中間材Ａ′の
寸法は厚さ;163.1mm×幅;2550mm×長さ;8146mmであり、
分割中間材A1′およびA2′の長さL1′,L2′はそれぞれ4
096mm,4050mmであった。Then, assuming that α 1 and α 2 are 50 mm and 50 mm, respectively, the results of calculation using the above equations (1) to (6) show that the dimensions of the intermediate material A ′ are thickness; 163.1 mm × width; 2550 mm × length; 8146mm,
The lengths L 1 ′ and L 2 ′ of the divided intermediate materials A 1 ′ and A 2 ′ are 4
096mm and 4050mm.
そこで、長尺スラブＡから中間材Ａ′までの圧延には
パス回路８パス、時間が85秒を要し、分割後における厚
鋼板a1,a2までの減厚圧延にはパス回数が６パスおよび
９パス、また圧延時間が55秒および80秒を要し、合計の
パス回数が23パス，圧延時間が135秒であった。Therefore, rolling from the long slab A to the intermediate material A 'requires 8 pass circuits and a time of 85 seconds, and the number of passes is 6 in the reduction rolling to the thick steel plates a 1 and a 2 after division. It required 9 passes and a rolling time of 55 and 80 seconds. The total number of passes was 23 and the rolling time was 135 seconds.
なお、従来法により２本のスラブを用いて厚鋼板a1,a
2をそれぞれ製造した場合は、１本目の厚さ;310mm×幅;
2240mm×長さ;245mmのスラブから厚鋼板a1を圧延するに
はパス回数で13パス、圧延時間で135秒を要し、２本目
の厚さ;310mm×幅,2240mm×長さ;2425mmのスラブから厚
鋼板a2を圧延するにはパス回数が16パス、圧延時間が16
0秒であり、したがって２本の厚鋼板a1,a2を圧延するの
に要した合計のパス回数は29パス、圧延時間は295秒で
あった。In addition, thick steel plates a 1 , a
When each of 2 is manufactured, the thickness of the first piece; 310 mm x width;
2240Mm × length; 245mm 13 path number of passes to rolling steel plate a 1 from slabs, takes 135 seconds rolling time, connect a second thickness; 310 mm × width, 2240mm × length; 2425Mm of the number of passes is 16 passes in rolling steel plate a 2 from the slab, rolling time 16
Therefore, the total number of passes required to roll the two thick steel plates a 1 and a 2 was 29, and the rolling time was 295 seconds.
これらの結果から明らかなように、本発明法は従来法
に比し約25％のもの能率向上が認められることがわか
る。As is evident from these results, the method of the present invention is about 25% more efficient than the conventional method.
＜発明の効果＞ 以上説明したように、本発明によれば、何ら特別の規
制を設けることなく、１枚のスラブから複数の厚鋼板を
歩留りの低下を惹起することなく、かつ、高能率で製造
することができる。<Effects of the Invention> As described above, according to the present invention, a plurality of thick steel plates can be produced from one slab without lowering the yield without any special regulation, and with high efficiency. Can be manufactured.
第１図は本発明方法の実施例の手順を示す図、第２図は
本発明方法を適用する圧延設備を示す平面図、第３図は
従来例を示す斜視図、第４図は他の従来例を示す斜視
図、第５図は従来の改善例を示す側面図である。 １……加熱炉,2……保温カバー,3……切断機,4……圧延
機,5……テーブルローラ,6……バイパスライン。1 is a diagram showing a procedure of an embodiment of the method of the present invention, FIG. 2 is a plan view showing a rolling equipment to which the method of the present invention is applied, FIG. 3 is a perspective view showing a conventional example, and FIG. FIG. 5 is a perspective view showing a conventional example, and FIG. 5 is a side view showing a conventional improved example. 1 ... heating furnace, 2 ... heat insulation cover, 3 ... cutting machine, 4 ... rolling mill, 5 ... table roller, 6 ... bypass line.
Claims (1)
一つのスラブに取合わせて大きな寸法となした長尺フラ
グを加熱後、一旦中間材に圧延し、分割したのち所定の
寸法の厚鋼板にそれぞれ圧延する厚鋼板の圧延方法にお
いて、 前記中間材を、その幅が先行して圧延される厚鋼板の幅
寸法に対応して必要とされるスラブの幅寸法と同一な方
法に、またその長さが前記先行して圧延される厚鋼板の
長さ寸法に対応して必要とされるスラブの長さ寸法と同
一の長さと、後続して圧延される厚鋼板の幅寸法に対応
して必要とされるスラブの幅寸法と同一の長さとを組み
合わせた長さに、それぞれなるように圧延する工程と、
この中間材を前記複数の厚鋼板のそれぞれの寸法に対応
する長さに分割する工程と、前記先行して圧延される厚
鋼板は中間材の長さ方向に、前記後続して圧延される厚
鋼板は90゜転回して中間材の幅方向に所定の寸法になる
ように順次圧延する工程と、からなることを特徴とする
厚鋼板の圧延方法。1. A long flag having a large size obtained by assembling a plurality of thick steel plates having at least different width dimensions into one slab, heating the long flag, temporarily rolling it into an intermediate material, dividing it, and then dividing the steel plate into a predetermined size. In the method of rolling a thick steel plate to be respectively rolled, the intermediate material, the width thereof is the same method as the width of the slab required corresponding to the width of the steel plate to be rolled in advance, and The length is the same as the length of the slab required in accordance with the length of the previously rolled thick steel plate, and the width is the width of the subsequently rolled thick steel plate. Rolling the required slab width to the combined length and the same length, so that each is rolled,
Dividing the intermediate material into lengths corresponding to the respective dimensions of the plurality of thick steel plates; and Rolling the steel sheet by 90 ° and rolling it sequentially in the width direction of the intermediate material to a predetermined size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8093290A JP2633372B2 (en) | 1990-03-30 | 1990-03-30 | Rolling method of thick steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8093290A JP2633372B2 (en) | 1990-03-30 | 1990-03-30 | Rolling method of thick steel plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03285701A JPH03285701A (en) | 1991-12-16 |
| JP2633372B2 true JP2633372B2 (en) | 1997-07-23 |
Family
ID=13732220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8093290A Expired - Fee Related JP2633372B2 (en) | 1990-03-30 | 1990-03-30 | Rolling method of thick steel plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2633372B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107790494A (en) * | 2016-08-31 | 2018-03-13 | 鞍钢股份有限公司 | Camel blank rolling method for producing steel plate with thickness of 6mm and limit specification by using medium plate |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100406404B1 (en) * | 1999-07-14 | 2003-11-19 | 주식회사 포스코 | A method for manufacturing thick steel plates with difference thickness from one slab |
| CN110252805B (en) * | 2019-04-26 | 2020-11-17 | 太原科技大学 | Manufacturing method of easily-welded composite board assembly |
-
1990
- 1990-03-30 JP JP8093290A patent/JP2633372B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107790494A (en) * | 2016-08-31 | 2018-03-13 | 鞍钢股份有限公司 | Camel blank rolling method for producing steel plate with thickness of 6mm and limit specification by using medium plate |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03285701A (en) | 1991-12-16 |
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